One of the more popular and common old world Killifish, Nothobranchius rachovii and also one of my personal favourites. The colours in these little beauties would put some marine fish to shame. Nothobranchius are part of the annual killifish family, where they would spend their life cycle in small bodies of water that would evaporate in the dry season, with the fish reappearing in the wet season. It was a common belief by the locals that the fish came down with the rain every year and were often referred to as Rain fish. The miraculous event of the fish dying and reappearing in the wet season was not the result of fish falling out of the sky, but was down to the Killis remarkable adaptability to survive the harsh environment. The fish is not only prolific in producing offspring, they grow at an extraordinary rate, and become sexually mature at an early age, all evolution traits to beat the predestined drought. The most remarkable trait annual killifish have developed is how they spawn by depositing their eggs within the depths of the substrate. As the water evaporates the adult fish die but the next generation is safely tucked away under the surface. As the ground dries and cracks the eggs become exposed to the air, and as the rain falls replacing oxygen with water (anaerobic conditions) it kickstarts the hatching process. and the cycle continues. #aquariumhobby #fishtanks #fishkeepers #fishkeeping #plantedtank #fishhobby #freshwatertank #castledawnaquatics #fishhobbyist #aquascape #fishofinstagram #fishtanksofinstagram #aquascaping #aquascaper #aquascapes #aquariumofinstagram (at Foshan) https://www.instagram.com/p/CSXgZ9Ooarc/?utm_medium=tumblr
